Vent free gas heater



FIG. 1 is a rear perspective view showing our new design;

FIG. 2 is rear view thereof, where the front view does not form a part of this design and, therefore, has been omitted;

FIG. 3 is a left view thereof, where the right view is a mirror image of this view, and, therefore, has been omitted; and,

FIG. 4 is a top view thereof, where the bottom view is a mirror image of this view, and, therefore, has been omitted.

The broken-line disclosure in the views is understood to be for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a vent free gas heater, as shown and described. 